Render Texture

struct STextureMapHeader
{
    unsigned int nNumSlices;
    unsigned int nTotalSize;
    unsigned int nFlag;
    unsigned short nWidth;
    unsigned short nHeight;
    unsigned short nFormat;
    unsigned char nNumMipLevels;
    unsigned char nDefaultMipLevel;
    unsigned char nInterpretAs;
    unsigned char nDimensions;
    unsigned char nMipInterpolation;
    unsigned char __padding;
    unsigned int nIADataSize;
    unsigned int nIADataOffset;
};

struct SMipLevel
{
    unsigned char data[dataSize];
};

struct SVector2
{
    float x;
    float y;
};

struct STilePolygonVertex
{
    SVector2 posLerp;
    SVector2 textUV;
};

struct IAData
{
    unsigned int polygonVertexCount;
    unsigned int altasWidth;
    unsigned int altasHeight;
    STilePolygonVertex tilePolygonVertices[polygonVertexCount * altasWidth * altasHeight];
};

struct RenderTexture
{
    STextureMapHeader textureMapHeader;
    SMipLevel mipLevels[textureMapHeader.nNumMipLevels];
    IAData iaData;
};